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    <title>Document</title>
    <style>
        .box {
            height: 40px;
            border-top: 3px solid #ff8500;
            border-bottom: 1px solid #edeef0;
        }
        .box a {
            /* 0单位可以省略 */
            padding: 0 16px ;
            height: 40px;
            display: inline-block;
            text-align: center;
            /* background-color: #edeef0; */
            /* 推荐加上：清楚地看到文字的位置 */
            line-height: 40px;
            font-size: 12px;
            color: #4c4c4c;
            text-decoration-line: none;
        }
        .box a:hover{
            background-color: #edeef0;
            color: #ff8500;
        }
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<body>
    <div class="box">
      <a href="#">新浪</a>
      <a href="#">新浪导航新浪导航</a>
      <a href="#">新浪导</a>
      <a href="#">新浪导航</a>
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